EP 0081911 A1 19830622 - Tactile writing aid.
Title (en)
Tactile writing aid.
Title (de)
Taktile Schreibhilfe.
Title (fr)
Aide tactile pour l'écriture.
Publication
Application
Priority
US 32848781 A 19811207
Abstract (en)
[origin: US4425095A] The invention provides a writing aid comprising a contoured surface having a plurality of relatively depressed surface portions and raised ridges or surface regions at least partially surrounding each depressed surface portion at a level differing therefrom by an amount rendering transition between a ridge or region and a depressed portion tangible to a person through a hand-held writing implement traversing the surface. The contoured surface may be provided by embossing writing paper or embedding threads therein, or may be provided on a substrate or backing sheet for a piece of plain paper.
IPC 1-7
IPC 8 full level
G09B 11/04 (2006.01); G09B 21/00 (2006.01)
CPC (source: EP US)
G09B 11/04 (2013.01 - EP US); G09B 21/002 (2013.01 - EP US)
Citation (search report)
- [X] LU 49134 A1 19660121
- [A] US 2616198 A 19521104 - SEWELL HARRY P
- [A] US 2503941 A 19500411 - RODRIGUEZ DIAGO ENRIQUE
- [A] US 1371430 A 19210315 - NICKERSON SAMUEL S
- [A] US 3579867 A 19710525 - KUHN HENRY S
- [A] US 3816943 A 19740618 - HENRY N
- [A] US 3872611 A 19750325 - KUHN HENRY S
- [A] US 4073070 A 19780214 - BOSTON JACQUELIN VAUGHAN
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 82306065 A 19821115; US 32848781 A 19811207